[bionet.molbio.evolution] naive Q. re: mutation rate mechanism

silber@sbphy.ucsb.edu (02/22/89)

Naive question: 
(true?): The genes encoding fundamental cellular processes change much
slower across evolutionary time than the genes controlling embryological
development. If this is true it is because (???) a significant
competitive edge can be gotten by a slight morphological change whereas
messing with the stability of fundamental metabolic systems is more risky.
If all that is true, then one should suspect that certain genes controlling
development may have evolved to be  more susceptible to mutation.  If, in
turn, that is so, would the factors associated with making these genes
more susceptible to mutations, be implicated in uncogenesis?

(please append all appropriate disclaimers and apologia for insertion
of 'outsider' question...etc..etc..)